Animation won't play on a custom rig in-game, only in editor

[TheLoonYT (olaiver)]

I want to have animations on a custom rig I made, which is made from imported mesh I made in blender. I have a HumanoidRootPart, Humanoid, Animator, a code, everything, but it just won’t work! I have searched countless forum posts, videos, tutorials, but nothing works and I have had to remake the entire thing more than 5 times and its getting frustrating because if I can’t do this simple thing that is in every roblox game, then we got a problem.

My custom rig animations won’t play in the game, only when I go on the animation editor. I have checked ids, priorities and all that, but I don’t have a clue on what is wrong.
I have made animations before on regular r6 blocky characters and they have worked. Just this custom one doesn’t. Please help me!!

[Microlosofto]

You’re missing something else, use Motor6D (not WeldConstraint).

Motor6D or bones are used for animations

[TheLoonYT (olaiver)]

Thanks, that was the issue. I had followed a tutorial that suggested Welds but they are making the animations not work. Thank you